TPS2346_08 Datasheet, PDF (1/30 Pages) Texas Instruments – OPTICAL NETWORK HOT SWAP POWER MANAGER

TPS2346
OPTICAL NETWORK
HOT SWAP POWER MANAGER
SLUS529 – MAY 2002
FEATURES
D Enables Hot Swap in High Availability Optical
Network Systems
D Programmable Current Slew Rate
D Power Supply Sequencing
D Sense Resistors Set Peak Current (IMAX)
D Overcurrent Circuit Breaker at 2× IMAX
D Precharge Output
D Logic Low Power Good Output
D Logic Low Enable Input
D On-Chip Charge Pump
D Low Sleep Mode Current
D Undervoltage Lockout (UVLO)
D Minimal External Parts Count
D 24-pin TSSOP Package
TYPICAL APPLICATION
DESCRIPTION
The TPS2346 Optical Network Hot Swap Power
Manager (HSPM) provides highly-integrated supply
control of three positive (3.3-V, 5-V, and 5.15-V) and one
negative (–5.2-V) supply rails with a minimum number
of external components. A linear current amplifier (LCA)
in each of the four device channels provides
closed-loop control of load current during insertion and
extraction events. This allows the designer to configure
the plug-in card’s maximum inrush slew rate and
magnitude according to the requirements of the system
supplies.
APPLICATIONS
D Hot Swap of ONET Modules
D Supply Power-Up/Power-Down Sequencing
5.15V
5V
ENABLE
PG
GND
3.3 V
–5.2 V
AD[00]
AD[XX:01]
R1
Q1
PLUG–IN MODULE
3 mΩ
R2
2 mΩ
Q2
R6
R7
10 kΩ _{1.2 kΩ}
C1
0.1 µF
C2
0.39 µF
D2 6.8 V
D1
6.8 V
VIN1
CS1 GATE1 VS1
VIN2
ENABLE
PG
RGND
TPS2346
IRAMP
PRECHG
VIN4
CS4 GATE4 VS4 VIN3
CS2
GATE2
VS2
CPUMP
AGND
CPGND
VS3
GATE3
CS3
5.15 V
5V
C3
0.1 µF
R8
10 Ω
R3
Q3
R4
0.2 Ω
R5
Q4
10 kΩ
2 mΩ
RP
BRIDGE DEVICE
EXAMPLE SIGNAL LINE _AD[00]
3.3 V
–5.2 V
ADDRESS/DATA BUS
AD[XX:01]
UDG–02080
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
www.ti.com
Copyright  2002, Texas Instruments Incorporated
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